Not sure if you drink, and I'm certainly NOT endorsing alcoholism, but go home and have a nice, big, ol glass of wine. Whew, nothing like that to suck you back into REAL reality.
I hope you DO get your mind off of things. Remember, DO NOT get pulled by H's emotions. I did so much the last few weeks and the days that I did not, right before H left, when I was kind and cheery no matter what, he totally calmed down. In my H's case, it's more like he's on defensive to my reactions. Your H has other issues with residual rejection and fear of rejection from you going on.
So, get centered again. Be happy, cheery an live in YOUR reality. Ignore the fake one that he presents (or doesn't present). No matter what mood H is in, how needy or weird, just be cheery and happy for YOU. Enjoy your kids, your life and your work. Find a project that will get you out of the house.
For me, I've started to take drives, that clears my mind or at least gives me room to think and cry. If my poor car could talk, oh. Working out REALLY helps...you know that. i swear, it's like an AD pill....this weekend I ran a road race for the first time in my life....I was on such a high, one of the best days. I wasn't great, but I made myself do it, for ME. Perhaps you can do the same. Enter in something small, with your kids, and push to do it so you can feel good about YOU. I really needed that.
OK, a good walk tomorrow. Remember sunscreen, a long-sleeve shirt and hat. Go for 10-15 min and turn around and walk back. Make it a nice, fast pace but you can still talk. If you want alone time, go alone and clear your mind, if not, take a friend. BUT, DO NOT take H. You need this time for YOU. You'll do that with him when the time is right.
